Electron Configuration
Electron configuration is the distribution of electrons in atomic shells (also called orbits or energy levels) and subshells (also called orbitals and sub energy levels) . Electron configuration is written in standard notation which shows shell number, subshell of that shell and number of electrons as superscript as given below. 1s 2 Coefficient 1 showing n=1 i.e “K” S showing subshell Superscript 2 is showing number of electrons 1s2 notation is telling us that "s" subshell of K (n=1) shell is having 2 electrons. In Electron configuration electron containing subshells with number of electrons present in it, are placed in standard sequence( increasing energy level). Firstly we take detail review of shells and subshells. Shells: Shells are major energy pathways around the nucleus in which electrons revolve. The maximum number of electrons present in a shell is determined by principal quantum number (n). Number of electrons in a shell are calculated by a formul...